C6 Messenger Downloader PDF malware analysis — malicious · 6cc7d67a6c87ef9e

MALICIOUS

PDF

49.4 KB Created: 2011-06-22 18:00:21 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: 989cc8578e8f0f376f5f70042ce8bdcb SHA-1: f8d6092dd21c72d6257b77d755712a0b38f5ee14 SHA-256: 6cc7d67a6c87ef9ed04800e0eff63db464fd113df617b993e1e2b0f4b15091fa

62 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 85%

MITRE ATT&CK

T1203 Exploitation for Client Execution

The PDF file contains a marker indicating an exploit for CVE-2008-2551, which is associated with the C6 Messenger Downloader. This exploit likely facilitates the download of a secondary executable from the URL http://artisanballoonz.com/system/system.exe. The embedded URL http://c6.community.alice.it/download/DownloaderActiveX.cab#Version=1,0,0,1 was also identified, though it is marked as benign.

Machine Learning

Nyx PDF Classifier suspicious score 0.2812

Heuristics 2

C6 Messenger DownloaderActiveX exploit critical CVE exact CVE_2008_2551

PDF stream bytes contain HTML/ActiveX content configuring the vulnerable C6 Messenger DownloaderActiveX control with propDownloadUrl and propPostDownloadAction=run. This is the published exploit shape for CVE-2008-2551.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://artisanballoonz.com/system/system.exe
- http://c6.community.alice.it/download/DownloaderActiveX.cab#Version=1,0,0,1

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_001_off0000070b.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x70B	73272 bytes

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